Robert Pattinson's partner hasn't seen Twilight

The 27-year-old singer is rumoured to be engaged to boyfriend Robert Pattinson - who she has been dating for over a year - but hasn't watched any of the popular vampire movie series which propelled the actor to international stardom alongside his then-girlfriend Kristen Stewart.

Asked if she has ever seen the 29-year-old hunk in the guise of vampire Edward Cullen, she replied: "No."

Despite being in such a high-profile relationship, the 'Pendulum' singer insists she has no concept of fame and doesn't "engage" in the celebrity world.

She told the Sunday Times magazine: "I don't understand what the levels [of fame] are. I'm a bit naive.... I don't engage in that world, even with myself, even with my own career."

Asked if settling down will impact on her creativity, she said: "I don't think it works like that. Don't you get freedom with age and experience, not confines?"

And the stunning star admitted she had broken down in tears over the racist abuse she had suffered online after getting together with Robert, and was particularly upset when someone posted a picture of themselves with a cancer-stricken pal and her response to them led to a barrage of hateful messages.

She said: "They all started attacking her.

"Within 20 seconds it was just like n*****, monkey, ugly, die b***h, all this stuff on his feed. It broke my heart . . . this lady who is really sick and is probably going to die."